I just got a 851W and had some trouble setting it up.
Specifically, when I turn on the WAN port, the LINK like would stay lit even when there is no cable connected to the port (fa4). This seems unusual.
Also, show interface gives me a up/up status. I thought the line protocol would be down unless there a physical link (cable connection) and both end are active?
Anyway, I want to make sure my 851W does not have a bad WAN port. Any pointer in determining the viability of the WAN port will be much appreciated.